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Fan Y.,China Electric Power Research Institute | Jun L.,China Electric Power Research Institute | Wenrong S.,China Electric Power Research Institute | Li X.,Pudong Power Supply Company
China International Conference on Electricity Distribution, CICED | Year: 2014

On the basis of analyzing and comparing current theoretical line loss calculation of low-voltage power distribution area, back/forward sweep algorithm is selected and improved by considering the influence of power loss correction from node voltage and introducing three-phrase unbalance factor to branch shape factor. It is verified that the improved algorithm has higher accuracy and applicability in comparison of equivalent resistance algorithm and traditional back/forward sweep algorithm with 20 randomly selected computable distribution areas, which contributes to the task of further theoretical line loss calculation of low-voltage power distribution area in Shanghai. © 2014 IEEE. Source

Miao Y.,Pudong Power Supply Company
2010 China International Conference on Electricity Distribution, CICED 2010 | Year: 2010

With a series problems such as global energy and resource shortage, several countries have begun to increase investment for new energy development. Because wind energy is renewable, clean and pollution-free, it is widely used in the entire world. Offshore wind farm does not take up valuable land resources, and the sea has abundant wind energy resources so that the wind turbine can achieve greater unit capacity. Therefore, the development of offshore wind farm has become a new direction of China's Green Energy Development. In this context, the study of large-scale offshore wind farm and the impact on the power system is necessary. Based on the analysis of Shanghai Nanhui wind farm's operation, this paper discusses the interconnection of the Donghai Bridge offshore wind farm and the short-circuit capacity, power quality, as well as the reactive power. © 2010 Chinese Soc for Elec Eng. Source

Wang X.,Tsinghua University | Liu K.,Tsinghua University | Liu K.,Pudong Power Supply Company | Luo H.,Tsinghua University | Yue Y.,Jiangsu Electric Power Company
Gaodianya Jishu/High Voltage Engineering | Year: 2015

In nitrogen and air, dielectric barrier discharge (DBD) is identified as Townsend discharge and the discharge is extinguished abnormally while gap voltage continues to increase. In order to experimentally study how the shallow traps (energy level E<1 eV) in dielectric material surface affect DBD at atmospheric pressure and to explore the mechanism of the abnormal extinction in Townsend DBD, we developed a thermally stimulated current (TSC) measuring device, which supplies DC voltage of more than 25 kV and holds measuring accuracy of 0.1 pA current along with a high capacity of resisting disturbance and repeatability. We used the device to measure the TSCs of ceramic and quartz, and found that both of the dielectrics have shallow traps. The energy levels of the traps are 0.37 eV and 0.63 eV for ceramic and quartz, respectively. The results indicate that, in ceramic, traps have a lower energy level and electrons are easier to excite. The trap charge of ceramic is 315.3 nC, while for quartz it is only 20.7 nC, so the traps in ceramic are much more than those in quartz, which is in accordance with the fact that DBD discharge can be realized using ceramic but using quartz can only result in filamentous discharge. It can be concluded that shallow traps in dielectric surface can offer seed electrons for DBD, and increasing the number of seed electrons helps to generate DBD at atmospheric pressure. ©, 2015, Science Press. All right reserved. Source

Yang Y.,Pudong Power Supply Company | Xu Y.,Shanghai Sheng Shi Xiang Hai Industrial Co.
IET Conference Publications | Year: 2013

In order to measuring the benefits of implementing demand side management (DSM) and promote the strategy of an energy-saving society in China, the author builds up a power-saving evaluation system. Focusing on lighting program and electromotor program, this evaluation system can figure out customers', suppliers' and the society's power-saving benefits by using formulas. The result of benefit analysis proves that if we implement DSM successfully, the energy efficiency can be raised so that the goal of energy saving can be reached. Therefore customers, suppliers and the whole society will all get benefits. Source

Yao C.,Pudong Power Supply Company
2010 China International Conference on Electricity Distribution, CICED 2010 | Year: 2010

The development and implementation of this project has successfully achieved that the live working can implement on the 60∼90 degree corner unit where elevated car can reach. Power Supply Company can improve power supply reliability, and has very positive implications in electricity sales, while improving the social and economic benefits. © 2010 Chinese Soc for Elec Eng. Source

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